Influences of reaction and thermal conditions on microstructural evolutions of ilmenite oxygen carriers for chemical looping combustion

doi:10.1016/j.fuproc.2021.107139

GIEC OpenIR

	Influences of reaction and thermal conditions on microstructural evolutions of ilmenite oxygen carriers for chemical looping combustion
	Chen, Liangyong 1; Wei, Guoqiang 2; Liu, Kunlei 3
	2022-04-01
发表期刊	FUEL PROCESSING TECHNOLOGY
ISSN	0378-3820
卷号	228 页码:14
通讯作者	Chen, Liangyong(101012271@seu.edu.cn)
摘要	Ilmenite ore has been widely accepted to be a cost-effective oxygen carrier (OC) of Chemical Looping Combustion (CLC) for CO2 capture. The focus of this study is to investigate into the influences of chemical impact, thermal variation and ageing effect on microstructure and performance evolutions of ilmenite OCs. Iron element migration, crystallinity and morphology alterations, and irreversible change of chemical composition were identified to be the major aspects responsible for gradual microstructural evolutions of Ilmenite OCs. Iron element migration from bulk materials to particle surface, occurring during the oxidation step of redox cycles, was of temperature- and O-2 concentration- dependences. A schematic diagram was developed to explain the pathways of irreversible iron migration and alteration of chemical composition in redox cycle reactions. By lowering phase interaction between Fe2TiO5 and TiO2, the cycled thermal shock (due to reaction and processing in CLC) promotes the iron element concentration on OC particle surface and the ilmenite OC reactivity. Longterm ageing at elevated temperature, as one of typical severe conditions in CLC, exhibits activation effects for ilmenite OCs, even though it causes increased crystallinity, denser particle structure and redistribution of Fe2TiO5-TiO2 phase
关键词	Chemical-Looping Combustion Ilmenite oxygen carriers Microstructural evolution Redox cycle Thermal conditions
DOI	10.1016/j.fuproc.2021.107139
关键词[WOS]	PHASE INTERACTIONS ; REDOX CYCLES ; COAL ; STABILITY ; METHANE ; DEACTIVATION ; PERFORMANCE ; ACTIVATION ; TRANSITION ; MECHANISMS
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2018YFB0605401-04] ; Entrepreneurship & Innovation Plan of Jiangsu Province of China ; Southeast University[2242019K3DZ08] ; China Pharmaceutical University[2242019K3DZ08]
WOS研究方向	Chemistry ; Energy & Fuels ; Engineering
项目资助者	National Key R&D Program of China ; Entrepreneurship & Innovation Plan of Jiangsu Province of China ; Southeast University ; China Pharmaceutical University
WOS类目	Chemistry, Applied ; Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000749956300005
出版者	ELSEVIER
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/35783
专题	中国科学院广州能源研究所
通讯作者	Chen, Liangyong
作者单位	1.Southeast Univ, Key Lab Energy Thermal Convers & Control, Sipailou 2, Nanjing 210096, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 3.Univ Kentucky, Ctr Appl Energy Res, Lexington, KY 40511 USA
推荐引用方式 GB/T 7714	Chen, Liangyong,Wei, Guoqiang,Liu, Kunlei. Influences of reaction and thermal conditions on microstructural evolutions of ilmenite oxygen carriers for chemical looping combustion[J]. FUEL PROCESSING TECHNOLOGY,2022,228:14.
APA	Chen, Liangyong,Wei, Guoqiang,&Liu, Kunlei.(2022).Influences of reaction and thermal conditions on microstructural evolutions of ilmenite oxygen carriers for chemical looping combustion.FUEL PROCESSING TECHNOLOGY,228,14.
MLA	Chen, Liangyong,et al."Influences of reaction and thermal conditions on microstructural evolutions of ilmenite oxygen carriers for chemical looping combustion".FUEL PROCESSING TECHNOLOGY 228(2022):14.